<body> <div id="root"> <h1>学生的基本信息</h1> <button @click="student.age++">年龄+1岁</button> <button @click="addSex">添加性别属性默认值是男</button><br> <button @click="student.sex='未知' ">修改属性值</button><br> <button @click="addFriend">在列表的首位就添加一个朋友</button><br> <button @click="updateFriend">更新第一个人的名字</button><br> <button @click="addHobby">添加一个爱好</button><br> <button @click="change">修改第一个爱好为爬山</button><br> <button @click="removeSmoke">过滤掉抽烟</button><br> <h3>姓名：{{student.name}}</h3> <h3>年龄：{{student.age}}</h3> <h3 v-if="student.sex">性别：{{student.sex}}</h3> <h3>爱好：</h3> <hr> <ul> <li v-for="(h,index) in student.hobby" :key="index">{{h}}</li> </ul> <hr> <h3>朋友们：</h3> <ul> <li v-for="(f,index) in student.friends" :key="index">{{f.name}}--{{f.age}}</li> </ul> </div> <script> Vue.config.productionTip = false; const vm = new Vue({ el: "#root ", data: { student: { name: 'zhang', age: 18, hobby: ['喝酒', '抽烟', '烫头'], friends: [{ name: 'li', age: 15 }, { name: 'wang', age: 10 }] } }, methods: { addSex() { this.$set(this.student, 'sex', '男') // Vue.set(vm.student, 'sex', '男') }, addFriend() { this.student.friends.unshift({ name: 'YY', age: 66 }) }, updateFriend() { this.student.friends[0].name = "小刘"; this.student.friends[0].age = 22 }, addHobby() { this.student.hobby.push('唱歌') }, change() { //splice添加表示从第0个开始，删除一个，新增加的值是爬山 //注意：不能直接通过数组下标的形式进行修改 //this.student.hobby.splice(0, 1, '爬山') //Vue.set(this.student.hobby, 0, '爬山') this.$set(this.student.hobby, 0, '爬山') }, removeSmoke() { //filter不影响原数组的改变 this.student.hobby = this.student.hobby.filter((h) => { return h !== '抽烟' }) } } }) </script> </body>
